放大谷歌折线图 [英] Zoom Google Line chart

问题描述

我正在尝试使用 Google Visualization API 创建折线图.我想启用缩放.文档说资源管理器"选项很有用.但是当我尝试使用资源管理器"选项时，图表显示但缩放不起作用.

I am trying to create a line chart with the Google Visualization API. I want to enable zooming. Documents say that the 'explorer' option is useful. But when I try to use the 'explorer' option, the chart is shown but zoom does not work.

这是我的代码:

function drawVisualization(dataValues) {
var data = new window.google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'Count');

for (var i = 0; i < dataValues.length; i++) {
    data.addRow([new Date(dataValues[i].Year, dataValues[i].Month-1, dataValues[i].Day), dataValues[i].Count]);
}

var formatter_short = new google.visualization.DateFormat({ formatType: 'short' });
formatter_short.format(data, 0);
var options = {
    title: "Time statistics",
    explorer: { maxZoomOut: 8 }
};
var chart = new google.visualization.LineChart(document.getElementById('date'));
chart.draw(data, options);
}

如何解决此问题并使折线图可缩放?

How can I resolve this problem and make a line chart zoomable?

推荐答案

这是我如何使用 dragToZoom 资源管理器功能获得缩放

Here is How I got the zoom with the dragToZoom explorer function

explorer: { 
        actions: ['dragToZoom', 'rightClickToReset'],
        axis: 'horizontal',
        keepInBounds: true,
        maxZoomIn: 4.0
}

小提琴在这里https://jsfiddle.net/4w626v2s/2/

也可以通过滚动来缩放

explorer: {
        axis: 'horizontal',
        keepInBounds: true,
        maxZoomIn: 4.0
}

滚动缩放的小提琴在这里https://jsfiddle.net/5h7jxqq8/2/

the fiddle for scroll to zoom is here https://jsfiddle.net/5h7jxqq8/2/

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